1979 Evinrude 4 HP Outboards Service Repair Manual, PN 5424, Page 71Get this manual
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1"ring 2 Driveshaft 3 Screw (2) 4 Impeller housing 5 Impeller 6 Water pump plate 7 Water tube grommet 8 Oil reta iner 9 Plug and washer 10 Gearcase 11 Thrust bearing 12 Propeller shaft assembly 13 Oil